H Apple had previously announced that browser her, Safari, utilizes the service Google Safe Browsing, using the "Fraudulent Website Warning" feature to protect them users from phishing scams. This means sending some data to Google. However, beyond the Safe Browsing service, the Safari browser sends data and the Chinese technology company Tencent.
Some users have realized that iOS 13 also sends some data to Tencent's Safe Browsing service. It is even speculated that all versions after iOS 12.2 send data to Chinese company.
It is not yet known whether the data collected by Tencent comes from Apple users outside of China.
Sending information to companies like Tencent is a cause for concern. How does the company use the data it collects? Google and Tencent are supposed to provide systems to counter phishing attacks. However, the Chinese company is treated with suspicion because it is known to cooperate with the Chinese government. Many fear that Tencent could use them information, that it collects, for espionage campaigns or other attacks.
Matthew Green, a professor at Johns Hopkins University, said Safe Browsing (and Google and Tencent) could be used by malicious people hackers to identify various users. Therefore, if the Chinese government had been pressing to identify dissidents (for example), Tencent could help.
If you want to disable the feature (Fraudulent Website Warning) that allows sending data, you can do so by going to: Settings> Safari.
Apple has enabled this feature by default, but does not inform users about sending the data to the Chinese company and their use by it. In addition, many people do not trust their technology companies China, as they believe they are transferring information to the Chinese government.